You can already do custom allocation in Rust. These efforts are about bringing support for custom allocators to the types in `std` so that you can combine use o

You can already do custom allocation in Rust. These efforts are about bringing support for custom allocators to the types in `std` so that you can combine use of a normal `Vec` with a custom allocator, instead of needing to definte your own `Vec` (or at least pull one in from a 3rd party crate).